Customer custom fields are great, but the only allow one 'thing' (event/sale/service) to be automated at a time.
What happens when a customer has 2 or 3 events/services open at the same time?
If custom dates and fields within OPPORTUNITIES could trigger automations, be used in If/Else conditions and in email content, then multiple events/sales/services can be automated at the same time.
This is how Active Campaign works, and I'm lost without it.